In my book I gave the open source movement the briefest of mentions and consequently there was a time when I thought I should research the whole phenomenon and write about it in depth. But, well, I didn't. So it's great to see that other people have made the effort to do so. The increasing dependence of commercial software systems on open source software, and open source software's dependence on the possibly declining motivation of its practitioners make any attempt to understand the open source movement very timely indeed.
Danny Crichton has posted an excellent article on TechCrunch, 'Open Source Sustainability' in which he acknowledges his debt to the landmark report by Nadia Eghbal published two years ago by the Ford Foundation. They are both essential reading for all those who depend on open source.